The virus that causes aids is called HIV. Once it end on a person's blood stream, the aids HIV virus attaches itself to the surface of the active T-cells, then inserts its own genetic information inside of that nucleus. The HIV DNA stitches itself on to the hose cells DNA. Reprogrammed T-cell becomes an HIV fat reproducing the proteins and other components and form new viruses. Soon, usually within a day the cell dies from the infection or was killed by the immune system. But, some other infected cells survive and before beginning to produce HIV they return to their resting state storing HIV genetic information. Because these resting T-Cells look normal the immune system and aids drug do not attack them. The cells can live for decades loaded adornment. But when the cells awaken and combat that force they also start chewing out more HIV virus.